Name 2 ways a maple tree can change over time

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which animal is a producer in this ecosystem